Regarding the last few posts. I finally got around to dipping into my very limited budget, and upgrading. As it happened, I bought a Dell laptop, which had very similar hardware and performance ratings to my two year old desktop.. Both are similar vintage and with very similar hardware.. With the Laptop, came a docking station.
I would have little use for four ext HDs (presumably all plugged in ?. My mind boggles!). But I do have a colour and a B/W laser plugged in, plus the usual mouse and keyboard, and superior audio equipment.. All of these are connected to my docking station, together with the Ethernet connection to my router.
Frankly, I know I could do better, with a desktop upgrade, but, on visual observation, my Laptop out performs the desktop. No, Quote, " Would be quite a job to attach all that stuff every time I would want 'desktop mode'.", is required. Click and the Laptop is connected.
I do have moderate requirements for performance, but, so far, I have not found it essential to use the Desktop for my work.
The only thing which I will miss, id the fascinating hobby of updating hardware by physically changing components. Other than that, I am almost prepared to give up the desktop entirely.
You have been able to get very powerful laptops for some time, Alienware created some powerful laptops with excellent graphics capabilities, but they were heavy buggers. I still have an Acer 19" laptop (I use that word loosely) that was as powerful and as heavy, as most desktops at the time. Laptop docking stations have been commensurately comprehensive in some circumstances, but you will not get that sort of system with a tablet, as there is no call. Few would look at attempting heavy duty work with the processing power of a tablet.
There is another aspect to consider with the all in ones, laptops included. If something goes amiss, you lose the lot and that has happened to me several times with laptops. With a desktop, if a screen goes, you may have another or it's easy to replace the broken one. If a graphic card goes, it's no effort to get a new one. If a hard drive goes, easy to replace. You can't do anything like that with most tablets, Surface especially, you just toss the lot and get a new one.
While tablets are all the rage at the moment, people will start to realise that they are as prone to breakages as mobile phones and not always easy or worthwhile to fix. And at $500-$1000+ to replace, that can become very costly, laptops are still a lot cheaper. So the desktop will still remain as the reliable and stalwart antique that keeps on working through adversity.